Ink jet head connection unit, ink jet cartridge and method of assembling the ink jet head connection unit

(19)

(11)

EP 0 759 362 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.07.1997 Bulletin 1997/30

(43)	Date of publication A2:
	26.02.1997 Bulletin 1997/09

(21)	Application number: 96113335.2

(22)	Date of filing: 20.08.1996

(51)	International Patent Classification (IPC)⁶: B41J 2/175, B41J 2/14

(84)	Designated Contracting States:
	DE FR GB IT

(30)

Priority:

22.08.1995 JP 213838/95
11.07.1996 JP 182517/96

(71)	Applicant: SEIKO EPSON CORPORATION
	Shinjuku-ku Tokyo 163-08 (JP)

(72)	Inventors:
	Nishioka, Atsuhsi, c/o Seiko Epson Corporation Suwa-shi, Nagano-ken, 392 (JP) Hanaoka, Yukihiro, c/o Seiko Epson Corporation Suwa-shi, Nagano-ken, 392 (JP) Sato, Kazuhiko, c/o Seiko Epson Corporation Suwa-shi, Nagano-ken, 392 (JP) Yamazaki, Tsutomu, c/o Seiko Epson Corporation Suwa-shi, Nagano-ken (JP)

(74)	Representative: Hoffmann, Eckart, Dipl.-Ing.
	Patentanwalt, Bahnhofstrasse 103 82166 Gräfelfing 82166 Gräfelfing (DE)

(54)	Ink jet head connection unit, ink jet cartridge and method of assembling the ink jet head connection unit

(57) An ink jet head connection unit, comprises a head component (210) having a first surface with one or more ink ejection openings (204) formed therein, and a second surface with an ink lead-in opening (227) formed therein, a case component (240) having a supply port (257) for supplying ink to said ink lead-in opening, and means (241, 237) for positioning the head component relative to the case component so as to align said ink lead-in opening with said supply port, wherein the head component is fixed to the case component by means of an adhesive. A recess (248) is formed in at least one of two opposing surfaces of the head component and the case component so as to create a space between them, an adhesive injection hole (234, 235) connected to said space is formed in the head component or the case component, and said space is filled with said adhesive. The ink jet head connection unit is highly reliable and easy-to-manufacture and is free of ink ejection failure and ink leakage.

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